Adjust the reference angle of the 2D rotation stabilizer
Ok I answer my own question :)

The reference angle of the rotation stabilizer is based on the angle of the points at frame 0 of the footage, regardless of the Start/End of the project. This angle will be the reference to maintain for the rest of the footage.

Therefore, to adjust the offset angle of the stabilizer, simply put the marker used for rotation at a different location at frame 0 only, then keep the rest of the track and go observe the results in the middle of your footage.